Life Sciences Commons^™

Ontogeny And Anatomy Of The Flower Of Limnocharis Flava (Butomaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

The flowers of Limnocharis flava (L.) Buch. are borne in an indeterminate umbel and each consists of three sepals, three yellow petals, and about 18 carpels surrounded by numerous stamens and staminodia. The androecium is centrifugally developed, and the last-formed members are staminodial; it is supplied by branching vascular systems. Carpels arise almost simultaneously, and a prominent residual floral apex remains. The carpels are partially conduplicately closed and are also primitive in possessing laminar placentation and in lacking differentiation of a style. The gynoecium is essentially apocarpous, but there are slight fusions of adjacent carpels near their ventral margins where …

A Metabolic Study Of The Isolated Perfused Snake Liver, James E. Turner

Master's Theses

A metabolic study was made on the isolated, perfused liver of Natrix fasciata fasciata (Linnaeus, 1776). Uric acid production, perfusate protein levels, serum protein patterns, perfusate glucose levels, and bile production were evaluated in this study as criteria of liver function.

The perfused liver was found to produce uric acid up through the fourth hour of perfusion. No significant differences (between the perfusions) were found in uric acid production/ gm of liver tissue.

Perfusate protein and glucose levels were found to be of a fluctuating or cyclic nature. There was found to be an inverse relationship between these two levels: …

Interference Of Ultraviolet Inactivated Parainfluenza 3 And Echo 21 Viruses With The Active Viruses In Tissue Culture, William Ernest Steinmetz

Master's Theses

Experiments were conducted to investigate the possibility of the production of interference by ultraviolet inactivated (UVI) Parainfluenza 3 (Para 3) and Echo 21 viruses with active Para 3 and Echo 21 viruses in tissue culture (TC).

Four major experiments were conducted: the effect of UVI Para ~ on active Para 3 in rhesus monkey kidney cell (MKC) tissue culture; the effect of UVI Para 3 on active Para 3 in HEp-2 TC; the effect of UVI Para 3 on Echo 21 in MKC TC; and the effect of UV! Echo 21 on Echo 21 in MKC TC. The rates of …

Survey Of The Venezuelan Species Of Ficus, David Walter Hall

College of Graduate Studies: Theses & Dissertations (1964–2006)

This study was undertaken to provide a circumscription of the genus Ficus in Venezuela. The material studied was representative of the collections that have been made throughout the country. A great portion of Venezuela is apparently unexplored botanically. With this in mind I have attempted to do as complete a study as possible with the material available with fully realizing the many limitations. this circumscription is intended as a starting point for future work,not a stopping place.

Seasonal Thermal Acclimation In A Population Of Iguanid Lizards (Sceloporous O. Occidentalis, Baird And Girard, 1852), Charles Stetson Greene

University of the Pacific Theses and Dissertations

Within the few years following the publications of the first studies on reptilian thermoregulation (Mosauer, 1936; Attsatt, 1939; Cowles and Bogert, 1944; and Strelnidov, 1944) there has been an increasing number of investigations concerned with the mechanisms that underlie this phenomenon. Many studies have demonstrated that heliothermic lizards maintain a relatively constant body temperature during per- iods of diurnal and seasonal activity. Much of this regulation is dependent upon behavior. An extensive review of thermoregulation in both lizards and snakes has been compiled by St. Girons and St. Girona (1956).

Digenetic Trematodes And Cestodes From Fishes Of The San Joaquin Delta, Stephen Richard Edwards

University of the Pacific Theses and Dissertations

To date there has been only on major study concerned with parasites of freshwater fishes of California. E. C. Haderlie (1953) summarized investigations up to that year and conducted a general survey of the monogenetic and digenetic trematodes, cestodes, nematodes, acanthocephalans, copepods, and hirudinians of fishes of Northern California. From 2010 fishes representing 36 species of 11 families examined over a three-year period, he obtained a total of 59 species of helminth parasites, copepods, and hirudinians, which include 20 species of digenea and 16 species of cestodes. In addition to the taxonomic study, Haderlie attempted to correlate the relative occurrence …

The Effect Of Neurosecretions From The Cerebral Ganglia On Blood Glucose Levels In Lumbricus Terrestris, Joan Vanderpol Craig

Masters Theses

Introduction

The presence of neurosecretory cells in the suprapharyngeal ganglia of Lumbricus terrestris has been well established (B. and E. Scharrer, 1937). Since these cells may well be the only source of hormones in this organism (B. Scharrer, 1959), the question arises as to their role in the animal's regulation of metabolism The particular aspect of this problem investigated here concerns the effect of these neurosecretory substances on the blood glucose levels in L. terrestris.

Preliminary studies by this investigator on glucose levels in earthworms revealed that blood samples of approximately 15 microliters could be obtained from each animal and …

Studies Of Cesium-137 Metabolism By Blatta Orientalis In Various Thermal Environments, Tsin Fu Chuang

Biology ETDs

The effect of temperature on cesium-137 metabolism in the oriental cockroach, Blatta orientalis, was studied. Adult and nymphal animals were fed cesium-137 to investigate the biological half-time, excretion rate, retention curve and distribution of the isotope among body tissues.

Metabolic rate studies at different temperatures showed an exponential relationship between oxygen consumption and temperature. The Q₁₀ was 2.56 for adults and 2.20 for nymphs in the 10 C – 35 C range.

Cesium-137 elimination rate increased as environmental temperature increased. The Q₁₀ for cesium-137 elimination was constant (1.2) over the 15 C – 35 C range and greatly …

Northern Geographic Limits Of Four Species Of Desert Rodents In The Rio Grande Valley., Antonio L. Gennaro

Biology ETDs

Pour species of desert rodents were studied 1n the Rio Grande Valley of New Mexico in an effort to detect the factor or factors excluding each one from areas north of their ranges. Their distributions were analyzed in relation to climate, vegetation, soil texture, and biotic competition.

The cactus mouse (Peromyscus eremicus) and rock pocket mouse (Perognathus intermedius} seem to be limited by temperature. Each is saxicolous and inhabits rocky outcrops as far north as certain isotherms for average annual maximal temperature, these being 71 F for£. eremicus and 69 F for~. intermedius. Occasionally the former inhabits nonrocky sites, but …

Sporicidal Efficiency Of Dimethyl Sulfoxide, Various Disinfectants, And Their Combinations For Four Strains Of Bacillus, William L. Lappenbusch

Biology ETDs

This study was concerned with the sporicidal efficiency of dimethyl sulfoxide (DMSO), various disinfectants, and their combinations or complexes. Spores of Bacillus subtilis var. niger (globigii), Bacillus cereus, Bacillus subtilis (5230), and Bacillus stearothermophiluswere used to demonstrate the sporicidal activity of DMSO, phenol, Clorox, phenylmercuric nitrate, silver nitrate, Roccal, merthiolate, and iodine. Dimethyl sulfoxide has been shown in the past to enhance the penetration of neighboring substances which it encounters whether it be by the formation of a complex or by a reservoir effect in which DMSO causes a change in the osmotic concentrations on either side of a semipermeable …

Biochemical Properties Of Salmonella Potsdam Bacteriophage P4/2, Clyde L. Roggenkamp

Loma Linda University Electronic Theses, Dissertations & Projects

Over 90% recovery of phage P4/2 was realized with differential centrifugation concentration and purification, whereas only about 16% was recovered from the aqueous two-phase polymer - Genetron - ECTEOLA-cellulose column system. Purity of preparations was greatest with the density gradient centrifugation (A₂₆₀ = 2.66 and A₂₈₀ = 1.80 per 10¹² plaque-forming units). With the chemical system of concentration and purification followed by an ECTEOLA anion exchange run, the A₂₆₀ was 6.6 and the A₂₈₀ was 4.3.

Three tests were employed to determine the configuration of P4/2 DNA: (1) a formalin denaturation test, (2) a thermal …

A Comparative Approach Into The Differentiation Of Two Strains Of Staphylococci, Walter D. Hoeksema

Masters Theses

Introduction

The purpose of this investigation was to differentiate Staphylococcus aureus phage type 42D from Staphylococcus epidermidis.

The investigation involved four approaches to this differentiation. The first was a selective screening technique on specific media to point out physical and biochemical characteristics and to demonstrate the presence of specific enzymes. The second was a drug survey which was used to show basic susceptibility and resistance to ten different antibiotics. The third was ultra-violet irradiation which was used to discern susceptibility and resistance to the soft rays of this spectrum segment. The fourth was a chromatographic procedure using labeled carbon which …

The Effects Of Estrogenic And Gonadotrophic Hormones On Normal Levels Of Some Blood Chemical Constituents In The Non-Breeding Female Mallard Duck, Wendell F. Hofman

Masters Theses

Introduction

In past years, a substantial amount of research has centered on the levels of certain blood chemical constituents in birds, particularly in chickens and pigeons. However, little has been recorded concerning the blood chemical constituents of the mallard duck, Anas platyrhynshos. Likewise, the effects of hormones on its blood chemistry, in conjunction with its reproductive system, have been almost totally unexplored. Therefore, this study, conducted from October 14, 1965, to March 3, 1966, had as its purpose the determination of normal quantitative levels of certain blood chemical constituents (the electrolytes--calcium, sodium, potassium; the proteins--albumin and globulin; and lipids) and …

Isolation, Identification And Antibiotic Sensitivity Of Enteric Obligate Anaerobes In Cases Of Gastro-Enteritis, Gordon E. Newlin

Biology ETDs

Organisms capable of living in the absence of atmospheric oxygen were first described in 1861. However, it was not until almost forty years later that anaerobes were discovered to be associated with the human body. From 1900 until the present, most work with anaerobes concerned media and methods to promote the growth of these organisms. Their classification has been attempted, but their taxonomy still remains in a state of confusion. Rarely, and only in rather obvious cases, has the pathogenicity of these organisms been investigated. Consequently, these organisms and their relationship to pathogenicity remain relatively unknown to bacteriologists today.

Studies On The Effects Of Commercial Detergents On Cucumber And Barley, Marylu Elizabeth Mudd

Masters Theses

Introduction

The fact that large quantities of detergents daily are being added to our water table and the appearance of billows of foam at the shores of many inland bodies of water have caused alarm among biologists and sanitation engineers. However, few observations of the effects of synthetic detergents on living organisms other than bacteria have been recorded.

The purpose of these studies was (1) to determine the effects of several commercial non-biodegradable detergents, Tide, Dreft, and Alconox, and one biodegradable detergent, Living, upon the germination and root elongation of seeds of a monocotyledon, barley (Hordeum vulgare L.) and a …

Sexual Receptivity And Fertility Of Androgen Induced Persistent Estrous Rats, Norman Donald Diebel

Masters Theses

The effect of neonatally administered testosterone propionate (TP) on sexual receptivity and fertility was studied. Dosages of 25 μg and ten μg were used and were administered s.c. in peanut oil on the fifth day of life. Vaginal smears of the animals receiving 25 μg were begun at the age of 61 days and indicated that these animals exhibited modified estrous cycles. By 90 days of age, most of the animals in both dosage groups were in constant vaginal estrus. These prolonged periods of vaginal estrus were often interrupted only by mating.

At 97 days of age 40 females which …

Home Range Analysis Of The Montane Vole, Don Rogers Toews

All Master's Theses

This study on Microtus montanus was divided into three major sections: 1) An examination of nests, burrows, and runways, 2) A comparison of two methods of home range analysis--live trapping and radio-isotope tracing, and 3) A comparison of the home range of Microtus montanus with other species of Microtus as published in the literature.

Biosystematics And Life Histories Of The Peromyscus Guardia Group Of Mice And Peromyscus Eremicus (Rodentia: Cricetidae), Leonard R. Brand

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this project was to investigate the taxonomic relationship and the biology of Peromyscus eremicus, and the Peromyscus guardia group of mice from islands in the Gulf of California.

Hybridization experiments were conducted between P. eremicus and P. interparietalis ryckmani. They were interfertile and produced fertile hybrids. Peromyscus guardia did not breed in the laboratory.

Body and skull measurements for P. eremicus, P. interparietalis ryckmani, and their F₁ hybrids were analyzed by computing the discriminant functions and plotting a canonical scattergram. Peromyscus interparietalis ryckmani is quite distinct from P. eremicus. The hybrids were larger than either parent …

Breeding Birds Of The Sandia Mountains, John L. Tatschl

Biology ETDs

A field study was conducted during the summer and winter months of 1964 and 1965 to determine what birds breed and winter in the Sandia Mountains. Study plots were established in eight different plant communities from 10,600 feet in spruce-fir to 6,350 feet in Embudo Canyon. Of the 154 species noted, 89 were found to breed in the Sandias. Permanent residents, arrival and departure dates, total numbers of breeding pairs per 100 acres per plant community, and nests were recorded. Biomass was recorded for each species and each community. The occurrence in flocks, pairs, or singly and the beginning and …

Va Survey Of Intestinal Helminths Occurring In Dogs From Albuquerque, New Mexico, Ronald P. Hathaway

Biology ETDs

In recent years there have appeared numerous publications dealing with intestinal helminth of dogs and the relationships of these helminths to public health. Although several species of helminths that normally infect dogs recently have be found to infect humans, most of these parasites are unable to complete their life cycles in man and are destined to wander aimlessly through tissues, bringing about a condition known as visceral larva migrans. The importance of such helminths as Toxocara canis and Ancylostoma canium in relation to human disease has been pointed out by Beaver et al. (1952) and Beaver (1956, 1959).

Distribution And Ecology Of The Bats Of Southern Hidalgo County, New Mexico, Jay Dee Druecker

Biology ETDs

This study has two objectives: (1) to determine the species composition and ecologic and geographic distribution of the chiropteran fauna in southern Hidalgo County, New Mexico, (2) to record the time and air temperature during periods of utilization of water holes by the species of bats found in the study area.

Most of the 1,250 specimens examined in this study were taken in mist nets over streams, ponds, and metal stock tanks. A few individuals were collected in day roosts, night roosts, hibernacula or by shooting. Most of the specimens are [reserved as standard museum study skins and skulls or …

A Comparative Floristic Study Of Mount Taylor And Redondo Peak, New Mexico, Neal L. Osborn

Biology ETDs

For several years, there has been an intensified interest and activity in floristic studies of various areas in New Mexico, especially of certain well-isolated mountain masses characteristic of many mountainous areas in New Mexico. Many of these mountain masses are, in effect, islands of Montane Biota separated from other islands by lower and drier mesa and valley barriers. Botanists realize a need to investigate thoroughly the floras of these areas with one another to reveal possible modifications in flora composition or species differences that may have arisen as a result of geographic isolation and subsequent changes in gene frequencies.

Heat Exposure And 137-Cesium Distribution In Citellus Spilosoma, Noel Savignac

Biology ETDs

Radiocesium ( ¹³⁷Cs) is formed in high yield from nuclear fission and has a long physical half-life, 27 yr. These facts plus ready absorption by the gastrointestinal tract (Hamilton, 1947) make cesium one of the most dangerous fission products and as such has provided impetus for the study of ¹³⁷Cs metabolism from the standpoint of both physical characteristics and health physics. As a portion of these investigations, the effects of temperature changes, specifically elevated environmental temperatures, were studied with the intent of demonstrating physiological factors involved in ¹³⁷Cs uptake and retention by animals native to semiarid environments. …

Some Developmental Aspects Of The Bacula Of Lasiurus And Antrozous, Modesto Del Castillo

Biology ETDs

A means of aging Lasiurus cinereus by bacular measurement was sought. The study indicated that linear measurements of the baculum cannot be used as a means of aging.

A histological study of the development of the baculum of Antrozous pallidus was conducted. The animals used in the study ranged in age from two days to eight weeks. The study showed that the structure is not preformed in cartilage.

The Initiation Of Infection By Dna From Bacteriophage Lambda, Gerald D. Elseth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Deoxyribonucleic acid isolated from bacteriophage λ can infect Escherichia coli K12 in the presence of adsorbed helper phage (Kaiser and Hogness, 1960; Kaiser, 1962). The manner in which λ DNA enters the cell and the possible role of helper phage in the penetration process is still not clear. Kinetic studies conducted in this laboratory during the initial stages of infection by λ DNA demonstrate a requirement for helper function during the penetration of an infectious molecule. Further investigation into this problem is needed and was the major objective of this study.

A Comparative Study Of The Effects Of Starvation On Two Mating Types Of Tetrahymena Pyriformis, Carolyn Gene Mohler

Theses & Honors Papers

The initial observable event in protozoan conjugation is the union, by pairs, of cells belonging to opposite mating types. The union does not occur immediately after mixing appropriate mating types; a starvation-initiated period (the refractory period) of approximately 4 hours is prerequisite for mating between the two mating types of variety 1, Tetrahymena pyriformis employed in this study.

The results of this study indicate that water-diffusible mating substances are produced by the mating types during the refractory period. The production of these substances is initiated by placing the cells under starvation conditions and not by contacts among cells of opposite …

Ecological Studies Of Blue Grama Grass (Bouteloua Gracilis), F. W. Albertson, D. A. Riegel, Gerald W. Tomanek

Fort Hays Studies Series

Blue grama grass (Bouteloua gracilis) was selected for detailed description here because of its wide distribution and importance throughout the Great Plains Region in the United States.

Additional Information On Basicladia Crassa Hoffmann And Tilden, Robert G. Anderson, Clarence B. Sinclair

Journal of the Arkansas Academy of Science

No abstract provided.

A Population Study Of The Peridiniidae Of Tomales Bay, Sidney Allen Cattell

University of the Pacific Theses and Dissertations

It is the purpose of this study to present a quantitative survey of the family Peridiniidae in Tomales Bay over the six month period between October thirtieth and May sixth. Emphasis has been placed on variation in the total Peridiniidae population for this period, on the seasonal variation of individual species, and on the possible effects of hydrographic and climatic conditions on the population.

The Comparative Osteology Of The Skulls Of Three Species Of Paralichthys, Family Bothidae, Anne Caperton Beirne

Master's Theses

This study was undertaken to determine if there were osteological variations in the skulls of young summer flounders, Paralichthys dentatus (Linaeus), southern flounders, Paralichthys lethostigma Jordan and Gilbert and - gulf flounders, Paralichthys albigutta Jordan and Gilbert that could be used as bases of species separation. As two of the species (dentatus and lethostigma) are of considerable economic importance, it would be of substantial value to establish skeletal characters that would help identify the young and. subsequently aid in determining their particular habitats where they occur in the same area.The three are closely related and difficult to recognize unless the …